core: bump uvicorn from 0.27.1 to 0.28.0 #18473

Job	Run time
lint (bandit)	2m 30s
test-integration	5m 29s
lint (black)	3m 10s
test-e2e (proxy)	6m 28s
lint (codespell)	2m 19s
test-e2e (oauth)	8m 26s
lint (pending-migrations)	2m 45s
test-migrations	3m 23s
test-e2e (oauth-oidc)	7m 37s
lint (ruff)	2m 19s
test-e2e (saml)	8m 22s
test-e2e (ldap)	10m 35s
test-migrations-from-stable - PostgreSQL 12-alpine	14m 9s
test-unittest - PostgreSQL 12-alpine	14m 5s
test-e2e (radius)	6m 7s
test-unittest - PostgreSQL 15-alpine	14m 35s
test-migrations-from-stable - PostgreSQL 15-alpine	14m 19s
test-e2e (flows)	6m 52s
test-unittest - PostgreSQL 16-alpine	15m 29s
test-migrations-from-stable - PostgreSQL 16-alpine	14m 1s
ci-core-mark	1s
build (amd64)	5m 3s
build (arm64)	15m 10s
pr-comment	8s
	3h 3m 22s

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